ui/ozone/platform/dri/dri_console_buffer.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/ozone/platform/dri/dri_console_buffer.h"
   6
   7 #include <sys/mman.h>
   8 #include <xf86drmMode.h>
   9
  10 #include "third_party/skia/include/core/SkCanvas.h"
  11 #include "ui/ozone/platform/dri/dri_util.h"
  12 #include "ui/ozone/platform/dri/dri_wrapper.h"
  13 #include "ui/ozone/platform/dri/scoped_drm_types.h"
  14
  15 namespace ui {
  16
  17 DriConsoleBuffer::DriConsoleBuffer(DriWrapper* dri, uint32_t framebuffer)
  18     : dri_(dri),
  19       handle_(0),
  20       framebuffer_(framebuffer),
  21       mmap_base_(NULL),
  22       mmap_size_(0) {
  23 }
  24
  25 DriConsoleBuffer::~DriConsoleBuffer() {
  26   if (mmap_base_)
  27     if (munmap(mmap_base_, mmap_size_))
  28       PLOG(ERROR) << "munmap";
  29 }
  30
  31 bool DriConsoleBuffer::Initialize() {
  32   ScopedDrmFramebufferPtr fb(dri_->GetFramebuffer(framebuffer_));
  33
  34   if (!fb)
  35     return false;
  36
  37   handle_ = fb->handle;
  38   stride_ = fb->pitch;
  39   SkImageInfo info = SkImageInfo::MakeN32Premul(fb->width, fb->height);
  40
  41   mmap_size_ = info.getSafeSize(stride_);
  42
  43   if (!MapDumbBuffer(dri_->get_fd(), fb->handle, mmap_size_, &mmap_base_)) {
  44     mmap_base_ = NULL;
  45     return false;
  46   }
  47
  48   surface_ =
  49       skia::AdoptRef(SkSurface::NewRasterDirect(info, mmap_base_, stride_));
  50   if (!surface_)
  51     return false;
  52
  53   return true;
  54 }
  55
  56 }  // namespace ui